Why does the skin itch before and after shower?

Dryness. What kind of water using if well water make sure there is water softener system .Use skin lubricant specially cetaphil.
Dry? If you have dry skin, add essential fatty acids to your diet, take vitamin d3, especially topically on dry skin, avoid using chemical laden lotions. Hydrocortisone used chronically thins the skin . Avoid excessive heat, keep shower short, use gentle organic soap, and pat yourself dry with organic cotton towel.